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Deck Rail and Moisture Intrusion

By
Home Inspector with NCW Home Inspections, LLC

Deck Rail and Moisture Intrusion-Wenatchee and Okanogan Home Inspection

Deck rails or what is referred to in the building trades as “Guards or Guardrails” play an important role in safety of the home.

The rules for guardrails are that they should be installed along any open-sided walking surfaces which include stairs, ramps and landings, porches, balconies or landings and decks that are more than 30 inches high measured vertically to the floor/grade below at any point within 36 inches horizontally from the edge of the open side.

The guardrails also need to be 36 inches high and withstand 200 lbs of pressure.

During home inspections I find that most guardrails fail to provide an adequate amount of safety. On a very low deck this may not be a huge deal but as the deck gains height this becomes very important.

                                   Guardrail on high deck

During a recent inspection I found this guardrail did not meet several criteria for safety. But also due to the design of the deck and guardrail attachment it was causing moisture intrusion into the home.

Here is a short video I put together showing the effect of this poor attachment.




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NCW Home Inspections, LLC  is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Orville, Cle Elum, East Wenatchee, Quincy and many more…      

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Jay Markanich
Jay Markanich Real Estate Inspections, LLC - Bristow, VA
Home Inspector - servicing all Northern Virginia

Are you sure they didn't attach that guardrail to add a little character to the ceiling of the room below?  Character is important.

It's so funny what people don't consider when they do things!  A house is a system, and lots of things interact!

May 21, 2012 09:29 PM
Donald Hester
NCW Home Inspections, LLC - Wenatchee, WA
NCW Home Inspections, LLC

Jay,

That is so true. A bunch of lag bolts through a membrane decking is just not a good idea.

I suggested to the client when the rail is replaced to move the attachment to the exterior edge of the deck.

The interesting part was how far the moisture moved horizontally then vertically within that cavity.

May 21, 2012 10:37 PM